Midea MAP05S1AWT-A User Manual page 10

6) No ignition sources
No person carrying out work in relation to a refrigerating system which involves
exposing any pipe work that contains or has contained flammable refrigerant shall
use any sources of ignition in such a manner that it may lead to the risk of fire or
explosion. All possible ignition sources, including cigarette smoking, should be kept
during which flammable refrigerant can possibly be released to the surrounding
space. Prior to work taking place, the area around the unit is to be surveyed
to make sure that there are no flammable hazards or ignition risks. "No Smoking"
signs shall be displayed.
7) Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before
breaking into the system or conducting any hot work. A degree of ventilation
shall continue during the period that the work is carried out. The ventilation
should safely disperse any released refrigerant and preferably expel it externally
into the atmosphere.
8) Checks to the refrigerating equipment
Where electrical components are being changed, they shall be fit for the purpose
and to the correct specifications. At all times the manufacturer's maintenance
and service guidelines shall be followed. If in doubt consult the manufacturer's
technical department for assistance. The following checks shall be applied to
installations using flammable refrigerants: the actual refrigerant charge is in
accordance with the room size within which the refrigerant containing parts are
installed; the ventilation machinery and outlets are operating adequately and are
not obstructed; if an indirect refrigerating circuit is being used, the secondary
circuit shall be checked for the presence of refrigerant; marking to the unit
continues to be visible and legible; markings and signs that are illegible shall be
corrected; and refrigerating pipe or components are installed in a position where
they are unlikely to be exposed to any substance which may corrode refrigerant
containing components, unless the components are constructed of materials
which are inherently resistant to being corroded or are suitably protected against
being so corroded.
9) Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety
checks and component inspection procedures. If a fault exists that could
compromise safety, then no electrical supply shall be connected to the circuit
until it is satisfactorily dealt with. If the fault cannot be corrected immediately
but it is necessary to continue operation, an adequate temporary solution shall
be used. This shall be reported to the owner of the unit so all parties are
advised. Initial safety checks shall include:
That capacitors are discharged: this shall be done in a safe manner to avoid
possibility of sparking; that there no live electrical components and wiring are
exposed while charging, recovering or purging the system; that there is
continuity of earth bonding.
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